ABB ACS350 Series, User Manual

Page: 107 / 314

Program features
107
Power loss ride-through
If the incoming supply voltage is cut off, the drive will continue to operate by utilising
the kinetic energy of the rotating motor. The drive will be fully operational as long as
the motor rotates and generates energy to the drive. The drive can continue the
operation after the break if the main contactor remained closed.
Settings
Parameter 2006 UNDERVOLT CTRL
DC Magnetising
When DC Magnetising is activated, the drive automatically magnetises the motor
before starting. This feature guarantees the highest possible breakaway torque, up
to 180% of motor nominal torque. By adjusting the premagnetising time, it is possible
to synchronise the motor start and e.g. a mechanical brake release. The Automatic
Start feature and DC Magnetising cannot be activated at the same time.
Settings
Parameters 2101 START FUNCTION and 2103 DC MAGN TIME
Maintenance trigger
A maintenance trigger can be activated to show a notice on the panel display when
e.g. drive power consumption has exceeded the defined trigger point.
Settings
Parameter group 29 MAINTENANCE TRIG
130
260
390
520
1.6 4.8 8 11.2 14.4
t (s)
U
DC
f
out
T
M
U
DC
= Intermediate circuit voltage of the drive, f
out
= output frequency of the drive,
T
M
= Motor torque
Loss of supply voltage at nominal load (f
out
= 40 Hz). The intermediate circuit DC voltage drops to the
minimum limit. The controller keeps the voltage steady as long as the input power is switched off. The
drive runs the motor in generator mode. The motor speed falls but the drive is operational as long as
the motor has enough kinetic energy.
U
input power
20
40
60
80
40
80
120
160
T
M
(N·m)
f
out
(Hz)
U
DC
(Vdc)
0 0 0